title: Methadone produces prolonged postoperative analgesia.
mesh_terms: D000328:Adult; D006207:Half-Life; D006801:Humans; D008691:Methadone / Q000097:blood / Q000627:therapeutic use*; D010149:Postoperative Pain / Q000517:prevention & control*; D013997:Time Factors
chemical_list: D008691:Methadone